A_16_practice06.java

package com.company;

import java.sql.SQLOutput;
import java.util.Scanner;

public class A_16_practice06 {
    public static void main(String[] args) {

////Question 1: print the pattern loop.
//        int n =4;
//        for(int i=n; i>0; i--) {
//            for (int j = 0; j < i; j++) {
//                System.out.print("*");
//            }
//            System.out.print("\n");
//        }


////Question 2: Write a program to sum first n even numbers using While loop.
//        int n = 4 , i =0;
//        int sum = 0;
//        while(i<=n){
//            sum = sum +(2*i);
//            i++;
//        }
//        System.out.printf("Sum of first %d even number is: %d", n , sum);


////Question 3: multiplication table
//        int n = 5;
//        for(int i =1; i<=10 ; i++){
//            System.out.printf("%d * %d = %d\n", n, i , n*i);
//        }


////Question 4: Multiplication table of 10 in reverse order.
//        for(int i =10; i>0; i--){
//            System.out.printf("10 * %d = %d\n", i ,10*i);
//        }


////Question 5: Factorial
//        Scanner sc = new Scanner(System.in);
//        System.out.print("Enter a number: ");
//        int n = sc. nextInt();
//        int fact = 1;
//        for(int i = 1 ; i<=n ; i++){
//            fact *= i ;     // fact = fact * i
//        }
//        System.out.printf("factorial of %d is : %d", n , fact);


////Question 6: Factorial (Using While loop)
//        Scanner sc = new Scanner(System.in);
//        System.out.println("enter a number: ");
//        int n = sc.nextInt();
//        int fact = 1 , i= 1;
//        while(i<=n){
//            fact *=i;
//            i++;
//        }
//        System.out.printf("factorial of %d is: %d ", n , fact);


//Question 7:Question 1 using for/while loop:
//        int i =4;
//        while(i>0) {
//            int j =0;
//            while(j < i) {
//                System.out.print("*");
//                j++;
//            }
//            System.out.print("\n");
//            i--;
//        }


//Question 8: What can be done using one type of loop can also be done using the other two types of loops - True or False.
//Answer: True


////Question 9: To calculate the sum of the numbers occur in the multiplication table of 8.
//        int sum = 0;
//        for(int i = 1 ; i<=10; i++){
//            sum += 8*i;  // sum = sum + (8*i)
//        }
//        System.out.print("sum = ");
//        System.out.println(sum);

    }
}